As the name says, it is a grassland. There is nothing much to see except you get a vintage view point of the Pacific Ocean. There are 2 ways you can get to the grassland, either you can drive up to the GPS coordinates mentioned or you can hike up the stairs for about half an hour from the coast. I would suggest that you take the stairs if you have time otherwise you will need to pay for parking if you are driving or riding.
Do have proper shoes, I have seen tourist coming with heels and later turn back where they started.